Part 1 - Complete each of the following sentences by filling in the appropriate word or phrase from the list below.
                negative                    noble gas                        octet                        anion
                positive                     electrons                         ions                         cation
                electron configuration

1.  An ionic bond is an attraction between oppositely charged ____________________.

2.  Anions have a ____________________ charge.

3.  An atom becomes an ion by losing or gaining ____________________.

4.  The ____________________ rule states that atoms tend to gain, lose, or share electrons in order to acquire a
     full set of valence electrons.

5.  When sodium and chlorine form an ionic bond, both ions acquire the electron configuration of a(n)

Part 2 - If the statement is true, write "true".  If it is false, change the underlined word or words to make it true.  Write your answer on the line.

____________________ 6.  Calcium becomes a cation by gaining two electrons.

____________________ 7.  A cation has a positive charge.

____________________ 8.  A sodium ion is smaller in size than a sodium atom.

____________________ 9.  The Lewis dot diagram for chlorine, a group 17 element, has six dots around it.

____________________ 10.  An aluminum ion has a charge of +3 because it gains three electrons.

Part 3 - How many electrons will the following elements gain or lose in forming an ion?

11.  calcium                                                       12.  aluminum

13.  fluorine                                                       14.  oxygen

Part 4 - What will be the formula of the ion formed when the following elements gain or lose valence electrons and attain noble gas configurations?

15.  sulfur                                                          16.  fluorine

17.  sodium                                                       18.  barium

Part 5 - Write the electron configuration for the following ions:

19.  Ca+2                                                           20.  Al+3

21.  F-1                                                              22.  O-2

23.  S-2                                                              24.  Na+1

25. Ba+2                                                            26.  K+1

27.  N-3

Back to the Unit 6 Page

Back to the Main Page